I was working with Company A, and got offer from Company B. Resigned

A on Jan 29, joined B on Feb 1st, and got visa transfer approved on

17th march.

Meanwhile, I got another offer from Company C within Feb. I gave

them papers from Company A, and they filed on Feb 25th. Company C

does not know that I switched to Company B from Company A. I got

rcpt number frm C.Now i resigned company B on 22nd march and joining

Company C on 29th of this month.My questions are

1:will there be any issue in getting H1B transfer approval for

company C?

2:Although my H1b transfergot approved for company B they haven't

sent me the paper yet.can they legally stop sending my paper?